141 lines
2.5 KiB
C
141 lines
2.5 KiB
C
/* ARM-specific clock functions. */
|
|
|
|
#include "kernel/kernel.h"
|
|
|
|
#include "kernel/clock.h"
|
|
#include "kernel/proc.h"
|
|
#include "kernel/interrupt.h"
|
|
#include <minix/u64.h>
|
|
#include <minix/board.h>
|
|
#include "kernel/glo.h"
|
|
#include "kernel/profile.h"
|
|
|
|
#include <assert.h>
|
|
|
|
|
|
#include "kernel/spinlock.h"
|
|
|
|
#ifdef CONFIG_SMP
|
|
#include "kernel/smp.h"
|
|
#endif
|
|
|
|
#include "bsp_timer.h"
|
|
#include "bsp_intr.h"
|
|
|
|
static unsigned tsc_per_ms[CONFIG_MAX_CPUS];
|
|
|
|
int init_local_timer(unsigned freq)
|
|
{
|
|
bsp_timer_init(freq);
|
|
|
|
if (BOARD_IS_BBXM(machine.board_id)) {
|
|
tsc_per_ms[0] = 16250;
|
|
} else if (BOARD_IS_BB(machine.board_id)) {
|
|
tsc_per_ms[0] = 15000;
|
|
} else {
|
|
panic("Can not do the clock setup. machine (0x%08x) is unknown\n",machine.board_id);
|
|
};
|
|
|
|
return 0;
|
|
}
|
|
|
|
void stop_local_timer(void)
|
|
{
|
|
bsp_timer_stop();
|
|
}
|
|
|
|
void arch_timer_int_handler(void)
|
|
{
|
|
bsp_timer_int_handler();
|
|
}
|
|
|
|
void cycles_accounting_init(void)
|
|
{
|
|
read_tsc_64(get_cpu_var_ptr(cpu, tsc_ctr_switch));
|
|
|
|
get_cpu_var(cpu, cpu_last_tsc) = 0;
|
|
get_cpu_var(cpu, cpu_last_idle) = 0;
|
|
}
|
|
|
|
void context_stop(struct proc * p)
|
|
{
|
|
u64_t tsc;
|
|
u32_t tsc_delta;
|
|
u64_t * __tsc_ctr_switch = get_cpulocal_var_ptr(tsc_ctr_switch);
|
|
|
|
read_tsc_64(&tsc);
|
|
assert(tsc >= *__tsc_ctr_switch);
|
|
tsc_delta = tsc - *__tsc_ctr_switch;
|
|
p->p_cycles += tsc_delta;
|
|
|
|
if(kbill_ipc) {
|
|
kbill_ipc->p_kipc_cycles += tsc_delta;
|
|
kbill_ipc = NULL;
|
|
}
|
|
|
|
if(kbill_kcall) {
|
|
kbill_kcall->p_kcall_cycles += tsc_delta;
|
|
kbill_kcall = NULL;
|
|
}
|
|
|
|
/*
|
|
* deduct the just consumed cpu cycles from the cpu time left for this
|
|
* process during its current quantum. Skip IDLE and other pseudo kernel
|
|
* tasks
|
|
*/
|
|
if (p->p_endpoint >= 0) {
|
|
#if DEBUG_RACE
|
|
p->p_cpu_time_left = 0;
|
|
#else
|
|
if (tsc_delta < p->p_cpu_time_left) {
|
|
p->p_cpu_time_left -= tsc_delta;
|
|
} else p->p_cpu_time_left = 0;
|
|
#endif
|
|
}
|
|
|
|
*__tsc_ctr_switch = tsc;
|
|
}
|
|
|
|
void context_stop_idle(void)
|
|
{
|
|
int is_idle;
|
|
#ifdef CONFIG_SMP
|
|
unsigned cpu = cpuid;
|
|
#endif
|
|
|
|
is_idle = get_cpu_var(cpu, cpu_is_idle);
|
|
get_cpu_var(cpu, cpu_is_idle) = 0;
|
|
|
|
context_stop(get_cpulocal_var_ptr(idle_proc));
|
|
|
|
if (is_idle)
|
|
restart_local_timer();
|
|
#if SPROFILE
|
|
if (sprofiling)
|
|
get_cpulocal_var(idle_interrupted) = 1;
|
|
#endif
|
|
}
|
|
|
|
void restart_local_timer(void)
|
|
{
|
|
}
|
|
|
|
int register_local_timer_handler(const irq_handler_t handler)
|
|
{
|
|
return bsp_register_timer_handler(handler);
|
|
}
|
|
|
|
u64_t ms_2_cpu_time(unsigned ms)
|
|
{
|
|
return (u64_t)(tsc_per_ms[cpuid]) * ms;
|
|
}
|
|
|
|
unsigned cpu_time_2_ms(u64_t cpu_time)
|
|
{
|
|
return (unsigned long)(cpu_time / tsc_per_ms[cpuid]);
|
|
}
|
|
|
|
short cpu_load(void)
|
|
{
|
|
return 0;
|
|
}
|